The Greyscale effect lets you convert a colour image to greyscale. This example demonstrates what happens when you set the greyscale to 100% using the Greyscale node. You can also use the Contrast node to adjust the darkness and lightness of the pixels in your element.

Using the Matte Output Option

Here is an example on how to use the Matte Output option of the Greyscale node. A frosted window was created using a snowflake image over a blue rectangle and a colourful background.

Here are the three drawings used for the example:

When the snowflake image is connected into the Greyscale node, it turns into a greyscale image. There is no transparency visible in the Camera view Matte View mode.

When the Matte Output option is enabled, the snowflake image colours are displayed as normal, but when the Matte View mode of the Camera view is enabled, you can see the transparency levels generated from the colour values.

When you connect the Snowflake images into a Cutter effect's Matte port along with the Window images, the window will be semitransparent, matching the alpha (transparency) channel generated by the Greyscale node.

Greyscale Properties

Parameter Description
Name Lets you rename the node.
Percent Lets you enter the percentage of black and white to apply to the image. You can enter a static value in the Percent field or attach the value to a function curve to change over time.
Matte Output Maintains the colour values. However, alpha values are read from the colours you see in the Camera view Matte View mode.